The Catechism teaches that Original Sin is a “death of the soul” with which all humans are afflicted. (CCC no. 403) “Death of the soul” means separation from God. (CCC no. 1033) Original Sin is said not to be the same as personal sin for which we are guilty, but is “sin” only by analogy. (CCC no. 404) Yet it seems to be real sin in the sense of separation from God (the “death of the soul”). Original Sin is “transmitted by propagation to all mankind.” (CCC no. 404)
But how can this be? What is propagated by our parents is our physical body. God creates every human soul individually, from nothing. (CCC no. 366) So how can the newly-created soul be deemed to be separated from the God who immediately created it? This seems to impute the creation of a sinful condition to God. This cannot be, but I do not know where to find the answer that overcomes this difficulty.